舰船用辐射交联无卤阻燃电缆护套料的研究

应用γ射线辐射交联技术，制备出以乙烯－醋酸乙烯/茂金属聚烯烃弹性体/纳米级改性氢氧化铝（EVA/POE/ ATH）为基材的舰船用无卤阻燃电缆护套料，探讨了共混物配比、ATH的种类与用量以及辐射剂量对材料力学性能和阻燃性能的影响。结果表明，随着POE用量的增加，材料的拉伸强度和断裂伸长率增加，耐热老化性能提高，但硬度降低；纳米ATH的加入使材料具有较好的阻燃性能；材料的辐射交联工艺可弥补阻燃剂对材料力学性能的影响，在辐射剂量为80 kGy的条件下，采用EVA /POE/ATH ＝90/10/60（质量份数，下同）的共混体系可制备出综合性能优异的护套料。

Studies on Radiation Crosslinking of Halogen-free Flame- retardant Cable Jacketing Compound Used for Naval Vessels

Cable sheaths was prepared from ethylene-vinyl acetate copolymer (EVA), ethylene-octene copolymer (POE), and nano-aluminum hydroxide (ATH) and was radiation crosslinked. The effect of formula, the type and content of ATH, and radiation dose on the mechanical and flame-retardant properties were investigated. With increasing POE content, the tensile strength, elongation at break, and thermal aging resistance of the compound increased, and its hardness decreased. ATH improved the flame retardancy of the compound. Radiation crosslinking enhanced the mechanical properties. The optimal recipe was found to be EVA /POE/ATH ＝90/10/60 and the optimal radiation dose was 80 kGy.